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连词一、连词主要包括并列连词和从属连词。在句子中，连词起连接词与词、短语与短语及句子和句子的作用。它本身在句子里不单独做句子成分。连词，是一种虚词，不能担任一个句子成分，但可以起连接的作用，即连接词与词或句与句。例如：Wemaybeleavingtodayortomorrow.NowImustgoorIshallbelatefortheparty.二、连词的种类连词有两类：1）从属连词：引导从句。随着从句作用不同，它们又可分为几类：从句种类主要从属连词从句种类主要从属连词时间从句When，while，asbefore，after，until，till，whenever原因从句because，as，since条件从句If,unless,supposingsuppose让步从句although，thougheven,though(if)while目的从句inorderthat,sothat方式从句aslikethewayasifasthough结果从句so…that,such…that,sothatso地点从句Where,wherever比较从句thanas此外还有that,whether等从属连词可引导名词从句，在句中担任主语、宾语等2）并列连词：连接两个互不依从的次、短语或分句：Slowbutsure.要慢而稳。（连接单词）She’llbebackeitherthisweekornextweek.她将在这周或下周回来。（连接短语）Iwentandshewentalso.我去了，她也去了。（连接分句）并列连词有下面几类：表示意思转折的连词butyethowevernevertheless表示因果关系的连词forsothereforehence其他并列连词andoreither…orneither…nornotonly…butalsoboth…andaswellas从属连词1.引导时间状语从句的连词这类连词主要有：(1)when:(2)while:（3）as:（4）before:（5）after:（6）until,till（7）since:（8）whenever:2.引导条件状语从句的连词1）条件状语从句主要由if,unless,supposing(suppose)引导：连词常考到的有以下几个词组：both...and：表示两者都....注意：当both...and连接主语时，后面动词一般要用复数。如：BothLilyandLucyareright.2.notonly...butalso:不仅...而且...。注意：后面动词采用就近原则,与butalso后的词保持一致。如：Notonlymyparentsbutalsomybrotherlikesthecat.3.either...or:或者...或者...。注意谓语动词采用就近原则。如：EitheryouorIamwrong.4.neither...nor：既不...也不...是either...or的否定形式。谓语动词采用就近原则，与nor后的词保持一致。如：Neitheryounorheisright.5.or的用法：意思为否则。如：Imustworkhard,orI'llfailintheexam.(我必须好好学习，否则我会考不及格了。)6.while,when,as这三个连词都可引导时间状语从句，但用法有所不同。1.HecanspeakEnglish_______Chinese.A.butB.alsoC.soD.and2.Physicsisnotsoeasy,_______Ilikeitverymuch.A.butB.orC.sinceD.because3.WillTomwaitforherathome______atthelibrary?A.orB.asC.sothatD.both4.Shehasason_______adaughter.A.butB.andC.soD.or5.I'llgiveherthegift______shearrives.A.soB.BeforeC.assoonasD.since6.Tomwas____illthatwehadtosendforadoctor.A.soB.veryC.andD.too7.Thewomanwas____angry_____shecouldn'tspeakanything.A.neither…norB.either…orC.both…andD.so…that8.______wegothomeitwasverylate.A.WhenB.WhileC.BecauseD.As9.Weheardclearly_____shesaid.A.whatB.whichC.beforeD.because10.Ican'tsleepwellatnight,______Ioftenfeelverytiredintheday.A.soB.becauseC.andD.or11.Whenyou'relearningaforeignlanguage,useit,______youwillloseit.A.butB.orC.thenD.and12.---Canyouplayfootball?---Yes,Ican,______Ican'tplayitverywell.A.orB.andC.butD.so13.Studyhard,______youwillfallbehind.A.andB.butC.soD.or14.Myfavoriteisactionmovie______Ithinkit'sexciting.A.andB.becauseC.butD.so15.Theboyisverysmart,______manyofhisclassmateslikehim.A.butB.soC.orD.for16.Hehasneverheard______seensuchathingbefore.A.norB.andC.orD.since17._________John_______Iarepolicemen.A.Neither...norB.Either...orC.Both...andD.Notonly...butalso18.MrSmithteaches______well______hislessonsarenoteasilyforgotten.A.very...thatB.quite...butC.so...asD.so...that19.Hedidn'tgotosleep______hefinishedhishomework.A.tillB.beforeC.afterD.until20.Ididn'tbuythedictionaryyesterday________myauntwouldgivemeone.A.untilB.becauseC.ifD.before21.Therunnerfell_______hequicklygotupandwentonrunning.A.orB.andC.butD.down22.Waitformeintheroom_______Icomeback.A.untilB.andC.soD.or23.I'llreturnthebookstothelibrary______soonaspossible.A.asB.soC.justD.but24.Goalongtheroad,_______you'llfindthemarketattheendofit.A.whenB.andC.orD.though25.You'llbelate______youdon'tgetupearlytomorrowmorning.A.ifB.whenC.beforeD.until26.Itwaslate.Shewashedherface______wenttobed.A.orB.andC.soD.but27.Heshoutedaloud______heranalone.A.afterB.beforeC.whenD.as28.Pleasereturnthebooktome_____youcomeback.A.assoonasB.whenC.whileD.as29..Ringmeup____youcometomyhouse.A.thoughBasC.beforeD.then.30.Imuststopwritingnow,______Ihaveratheralotofworktodo.A.aB.soC.whenD.since31.Thebusdidn’tleave_____everyonegeton.A.afterB.whileC.untilD.when32.I’llleaveamessage_____hewillknowwhereweare.A.sothatB.assoonasC.forD.that33.Mysisteris____young____hecan’tgotoschool.A,too,toB.enough;toC.sothatD.as;as34.Hisbrothergotupearlier____hecouldcatchthebus.A.asifB.soC.sothatD.than35.Itisalmostthreeyears____Isawhelast.A.whenB.sinceC.afterD.that36.---I’mgoingtothesupermarket.----Willyougetmesomechocolates____youarehere,mum.A.sinceBbecauseCifD.while37.MrGreencametoChinain2000,______hehaslivedhereeversince.A.andB.orC.butD.for38.____theyarebrothers,theydon’tlooklikeeachotheratall.A,BecauseB.ThoughC.WhenD,As39.Iknownothingaboutit____mybrothertoldmeyesterday.A.becauseB.sinceC.untild.so40.Hefailed_____becauseheisn’tclever______becausehedidn’tworkhard.A.notonly…..butalsoB.both….andC.either…orD.not…but41.Theteacherwonderedwhyhehad____questions.A.somuchB.somanyCsuchmuchD.suchmany42.Wewereswimminginthelake____suddenlythestormstarted.A.whenB.whileCuntilD.before43.Wecan_____see____touchtheair.A.notonly,butalsoB.both,andC.either,orD.neither,nor44.Youcan____stayathome_____gotomyhometownwithme.A.not,onlyB.eitherandC.bothorD.eitheror45.Weleftin_____ahurry_____weforgottolockthedoor.A.so,soB.so,thatC.such,thatD.suchso46.__Judy,youlooksotired.__Yes.Ididnotgotobed____itwastwelvelastnight.A.whenB.unlessC.untilD.after47.Shewassointerestedinthebookthatshehasreaditforthreehours____sherealizedit.A.untilB.beforeC.afterD.when48.Jac